Impact driver



FIG. 1 is a perspective left view of an impact driver showing my new design;

FIG. 2 is a perspective right side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a bottom plan view; and,

FIG. 8 is a top plan view thereof.

In the above drawings, the broken lines and the areas within the broken lines form no part of the claimed design. 

CLAIM The ornamental design for an impact driver, as shown and described. 